Well just looking at them I would say the mold was too cold for starters, and your alloy might need a bit more heat, and/or a bit of tin.
Here is what I would, or have done when I get bullets like those. First off I will usually clean the mold again with a tooth brush and some liquid detergent, in as hot of water as I can stand. After the mold has dried and I put a dab of lube under the sprue plate I try it again.
If it still throws wrinkled, I pour faster until I get them falling out frosted. If at that point they are still coming out wrinkled, I dump them all back in the pot, and I start adding in measured amounts of 95-5 solder to the pot.
I measure it so I can keep track of how much I added or might need to add later on. My strips are usually about 4" long. After I add one, I stir it up really good and pour some more. Again I make sure I pour them fast enough to get them dropping frosted. This way I know for sure and certain that my mold is up to temp.
If at this point they still do the wrinkles thing, I will add another 4" of solder. I do this usually three times and then I will grab another mold and pour that batch of alloy into something else. I don't like to waste the tin and I know from experience that if I start out with straight wheel weight alloy I should have VERY pretty bullets by this time.
With Lee molds however sometimes there is a period of conditioning, it might take cleaning them several times before you get all of the cutting oil out of the pours. Then just when your about to pound it into submission with a 4# hammer, they start dropping great bullets.
One last thing about Lee molds. When I first started out a few years ago, I read all about smoking the cavities. To date every one I DID smoke has been scrubbed clean. It isn't necessary once you have them cleaned and the oil out of the pores they will cast great just as they are. Plenty of folks still use something, but I gave it all up and just use them like they come now. To be honest I found out by personal experience that the "smoke" can and will induce issues that have you chasing your tail, as will not having enough tin for a good fill out, or not having your mold or alloy up to temp.
I sent one to another fellow here on the forum not too long ago. I poured up 10# worth about three days before I sent it to him and he got it just like I left it. Ready to cast with.
Hope this helps.