Ok, those results are from a skin prick test - not a blood test. I don't see where they tested you for shrimp, specifically, though?
The first page you posted shows that they tested you for some typical environmental allergens. Most of your results were smaller than the histamine control except for the dust mite ones which were the same size, so it's most likely your 'worst' allergy, but your wheal size was still pretty small. The numbers represent the size of the wheal (the hive like bump) and the flare (redness around the wheal) in millimeters.
The sheet they gave you about oral allergy syndrome is because sometimes when we're allergic to one thing (like a pollen or a dust mite), our bodies will mistake a similarly shaped pollen or a similar protein in something we eat and cause oral symptoms - especially during that pollen season when our bodies are already on high alert. So, for example, I'm allergic to ragweed. If I eat melons my mouth itches and my lips swell up. If you test me, I'm not allergic to melons, but my body mistakes the melon for ragweed pollen. There's a chance your dust allergy could make you have some oral symptoms when you eat shrimp even if you're not allergic to shrimp, but it's not real likely. There are a lot of people with dust allergies who tolerate shrimp just fine. It may just be something to be aware of, but not worry too much about unless you want to avoid shellfish if you're having a lot of allergy symptoms around that time. Of course that's assuming you don't have a shrimp allergy (basing that just on the skin test results you posted).
The last page you posted was the food allergy skin testing and the only thing measured was the histamine control. You did not test allergic to any foods. And they definitely did not test you for separate types of shellfish on that test - just a general shellfish mix.
Edited for added clarity.