Here's my take on the July map

1 and 3 and 4: the seas at high latitudes in summer never have a high pressure. The pressure is always higher than overland though.

2. Again the pressure is higher than the surroundings but is still low compared to the overall map. Its gradual.

5 that depends on the height of the mountains. TAll ones block the moisture and affect the flow of air indeed but rarely stop it. I dont have a good understanding of the dynamic but i had a good link to an article about this somewhere. Its part of physics fluid dynamics.

6 Really strong winds and moist enough like Ushuaia, Argentina.

7 and more generally concerning the latitudes around 30ş S.

It is almost a continuous high pressure system over with most winds blowing west or east depending on the latitude. Some of yoursare blowing from the low to the high but it should be the opposite.

Lastly, you have several smaller isolated system , mostly low preseure, where winds converge but dont seems to interact with their surroundings. If you look at the maps.i linked earlier you can see that often, the air flow from one region to the other in a relativly smooth maner. From high to low from low to low and from low to lowest assuming we can find where the lowest is.