That definitely looks like something bleeding through. If it were rust from iron incllusions, the rust spots would be much "softer" stains, as in, appear a bit clouded. They would also appear to "run" from the spot of origin. These are solid stains with well defined edges. That said, I don't know if this would be from the screws. They appear to be too close. If they were screws, the stains would most likely (but not for sure) be about 16" apart, and (assuming these are 3x6 tiles) in the first pic, they appear to be about 9" apart, and in the last one, about 3" apart. Additionallhy, if it were screws, it would be very coincidental for them to all apear on the edges of the tile. I STILL think it's something coming from behind the tiles, though.

Make lemonade out of the lemons. Place some steel shavings randomly on the floor , swirl them around, and dampen it down until it rusts. (Your local machine shop will be happy to donate.) Now you have a stained concrete slab that used "organic" stains. Clearcoat it with epoxy and you're done. You can do the same thing with some copper or copper wood preservative to add some blue green to the mix.

GWL11 has a "hidden" cycle to clean the machine of residue, but that may not be sufficient when it has already accumulated enough to get on the clothes. Try the cleaning process, repeat if needed. If the problem continues then disassembly is the only recourse. GWL11 is a little easier to disassemble than AquaSmart models. There's no cap to pry off the agitator, simply remove the softener cup, reach down inside and unscrew the wingnut. There are no Dynaflex straps, just one bias spring attached from the tub cover to the left-front suspension rod. Detach the spring from the suspension rod, leave it attached to the tub cover. The cleaning cycle is programmed thusly: Press and hold Favorite until it beeps a 2nd time and the light flashes. Select Perm Press. Select Hot wash. Press Favorite to save the setting. The cleaning cycle can now be run whenever desired by selecting the Favorite cycle. It may not include a soak period. The Soak option should be lit if so, try selecting it if not. Otherwise you can soak by turning off the power after a few mins of agitation, then restart the Favorite cycle to finish. I suggest using 2 cups of an enzyme-formula automatic dishwasher detergent instead of laundry detergent. Two cups of laundry detergent may generate a LOT of sudsing, dishwasher detergent doesn't suds and the strong enzymes will help dissolve the residue. GWL11 cleaning cycle CAN be used to wash clothes, and is the ONLY way to get a full-fill hot wash on EcoSmart models. To bobbie46 -- your AquaSmart should also have a cleaning cycle. Check under the LifeCycle selections for a Clean-up / Clean Me choice. A 2-hr soak is included. Use dishwasher detergent.

Rust means iron in the water of which there should be none. Its not hard to get test strips for. Are you on a well or municipal water? If discovered, a sequesterant is needed so stains can't form. They are expensive but Cu-Later pouches in the skimmer will pull the iron as well as copper out of the water in a couple weeks or so while the sequesterant prevents further staining. If the finish is affected, an ascorbic acid bath (vitamin C in mass) may be called for first to get it back in the water and be held captive by the sequesterant and then the pouches. Having an anode in the skimmer is good, especially if putting on at the pad is difficult. If the bond wire's potential for it isn't the same as the salt cells, i.e. there shouldn't be but maybe 1 ohm between the two, a small current can form. If the anode isn't connected to the bond, the stainless would attract the current because it is and the current has some place to go. With both connected, the current is absorbed by the anode which wears with time. Scott