PM9 - 1st 2 Range visits- what happened?

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Last weekend I bought a new pm9 black with night sights, 1000 rounds of Federal Am Eagle 115 FMJ and 20 Federal 124 JHPs. Also got one extra kahr 6 round mag and 2 promag 7 round mags.

First visit to the range was flawless. 50 FMJs and 20 JHPs. Everything fed and shot great.

Then I stripped it down and cleaned and oiled very lightly.

Second trip to the range after cleaning- jammed a lot. Could I have messed up the reassembly or something? Same ammo, same mags. Only thing different was it was a different day and I cleaned it in between.