They are soo tiny. And the top of one of them looks weird. Anyone help please? First photos belongs the older one.

No offense Bro but them girls are done. Best advice I can give it start a new run ASAP.

Not much you can do now, but I would never buy seeds from this breeder ever again, they are some really poor genetics right there.

Please check your runoff ph to see what could be wrong. Work your way up from there, does the light work well for that strain? Do you have the correct soil and nutrients. She looks rather healthy but stunted. Was there some phase of overwatering, it seems like this could be the cause as others have pointed out.

ph issue, micro nutrients, something is heavily wrong. think you not measure it or your ph meter is broken and lies.

The reddish colors you see are either genetics or the temperatures at night are dropping below 68F - same reasons you see leaves turn color outside in the Fall, if you have that season in your region. The paler plant needs a little more fertilizer by comparison -- how fast it got paler by comparison should be the guide to how strongly you react.. also considering it's nearing the end be sure to not over-do it. Autoflowers, even the same strain, can be wildly different. you'll get more consistency from photoperiods, but clones are the only way to go if you reqquire consistency. I see couple plumping calyxes at the top, that should continue. It's a shit ton of leaf, but not stretchy. So i'm not sure if the light was weak or the plant is just small. Autoflowers kinda suck in my humble opinion. One way or another, this plant was slowed down a bit. whether it was the ratio of nutes or something else, can't be sure from this information. Even autos should give you 50-100g each without delaying their flower with stress. Probablyhave an easier learning curve in a soilless grow context... and with photoperiods. you can adjust and extend vege phase if things aren't running smoothly.