The pictures look like the OP applied laquer-based paint on top of enamel-based paint.
This is basically the effect you will see by using old-style (e.g. pre Jan 2009) "5-ball" Krylon paint, such as the coveted Semi-Flat black on top of any type of enamel paint. It will react and cause the bubbling effect.
The reason is that basically the laquer based paints contain a high amount of MEK (methyl ethyl keytone), which, basically, is a paint stripper to all enamel paints. (Check the cans of stripper out). Therefore when you apply over any existing paint that is not laquer, it essentially starts 'stripping' it which causes the bubbles/crinkles.
The only two ways around this is to use a thick primer, like Kilz or Zinser (the ones with 3x larger holes in the nozzle of the rattle can, or roll it on), and then sand and then spray with Laquer based paints.
Now, if you are seeing this when spraying fresh enamel based paints (basically what 85% of the cans of paint out there are made with), then you likely have not removed oils and other chemicals correctly, or spayed too much in an area, or not shaken the can fully, or done so in wrong humidity conditions, or sprayed too soon after a previous coat has cured, or any combination of the above.
I used to use tons of Krylon Semi-Flat black (1613) since it was almost as matte as flat, but not chalky, but no longer have acces to it (cheaply) since they made them change their formula for non-industrial applications (51613 which is basically semi-gloss but they call it Satin now). All Krylon now is enamel based paint and that sheen is no longer available in the current formulations. I did run into many instances of wasting a can by not properly surface prepping due to laquer over enamel issues.
I can rarely remember problems using 'standard' (non laquer) based paints causing wrikling however. Doublecheck the can and the MSDS (material safety data sheet) on the MFG web site to see what the paint is made of. There are still some laquers available, like those for spraying car engines black that will blister immediately on spraying over almost any other existing paint.