Some fields are not populated with data from the second form

Some of my fields are missing the data when populating my second form?

Form1: http://www.jotform.com/?formID=51386206687160#

Form2: http://www.jotform.com/?formID=51386186795167

I look at your second form and some of the field names from your second form does not match on the prepopulating URL.

Example for the Date of Birth, the field name is DOB not DateofBirth.

To correct it, simply change the highlighted part to DOB.

http://www.jotform.us/form/51386186795167?firstName={firstName}&lastName={lastName}&email={email}&address={address}&city={city}&state={state}&zipCode={zipCode}&phone={phone}&DateofBirth={DOB}Gender={Gender}&Snoring={Snoring}&SnoreLoud={SnoreLoud}&Breathing={Breathing}&NeckSize={NeckSize}&HTN={HTN}&SleepyBusy={SleepyBusy}&SleepyDriving={SleepyDriving}&SleepScore={SAS}&Height(ft)={heightft}&Height(inches)={heightinches}&Weight(pounds)={weightpounds}&BMI={BMI}&MedicalConditions={MedicalConditions}&Medications={Medications}

Here is the corrected version of the URL. I have corrected all the field names highlighted in your screenshot.

http://www.jotform.us/form/51386186795167?firstName={firstName}&lastName={lastName}&email={email}&address={address}&city={city}&state={state}&zipCode={zipCode}&phone={phone}&DOB={DOB}Gender={Gender}&Snoring={Snoring}&SnoreLoud={SnoreLoud}&Breathing={Breathing}&NeckSize={NeckSize}&HTN={HTN}&SleepyBusy={SleepyBusy}&SleepyDriving={SleepyDriving}&SAS={SAS}&heightft={heightft}&heightinches={heightinches}&weightpounds={weightpounds}&BMI={BMI}&MedicalConditions={MedicalConditions}&Medications={Medications}

If you come across any issues again, do let us know.